Facing machine



t 1mm; 1930. y J. H. TAYLOR 1,768,272

FACIHG MACHINE Filed Jan. 27, 192B 6 Sheets-Sheet 2 rfames Half? @lor J.H. TAYLOR` FACING MACHINE ann 24, 1930.

Filed Jan. 27, 1928 6 Sheets-Sheet 3 /llll lill. lll..

June 24, 1930. J. H. TAYLOR V v 1,768,272

FACING MACHINE Filed Jan. 2,7'. 19,28 '6 sheets-sheet 4 fnz/nof" JamaiHal! @Zar June.24, 1930. J. HQTAYLOR Y FAcING MAGHINE Filed Jan. 27.192s 6 Sheets-Sheet 5 ilu 24, 1930. Jy H, TAYLQR 1,768,272

FACING MACHINE Filed Jan. 27, 1928 6 Sheets-Sheet 6 0 /2 90 Z Y /60 v270 Ime/fof Patented June 24, 1930 UNITED STATES JAMES HALL TAYLOR, FOAK PARK, ILLINOIS FACING- MACHINE Application filed. January 27, 1928.Serial N0. 249,973.

This invention relates to facing machines, and more particularly to amachine for dressing or facing frusto-cylindrical surfaces, such as theianges of steam nozzles for boilers and similar articles.

In facing steam nozzle flanges or other substantially frusto-cylindricalarticles, it is necessary to move the cutting point of the cutting toolthrough a substantially sinu soidal path toward and away from the faceof the article being dressed or faced, the high and low points of thiscurve corre spending to the high and low points of the faced or dressedsurface of the article, that is, to the radius of curvature of suchsurface. It is the present practice in the art to provide a separatepattern or guide for each radius of nozzle flange to be faced, thisguide being used in connection with suitable mechanism including amember movable in contact with the operating face of the guide wherebythe desired movement is imparted to the cutting tool. This practice isobjectionable as necessitating the provision of a large number ofpatterns or guides of different radii which occupy appreciable storagespace. It is also'objectionable in that it frequently happens thatnozzle flanges are required for use on boilers of different radii thanthose ordinarily accepted as standard.

In such cases it is necessary to construct a special guide or pattern.This necessitates considerable delay in preparatory work for facing thenozzle flange and greatly adds to the cost of such operation. I havefound that these objections can be avoided by providing a facing machinein which the cutting tool is moved toward and away from the work by anoperating member which swings back and forth in an arc, means beingprovided for varying or adjusting the radius of the arc through whichthis member moves.

1n its broader aspects, my invention inv cludes means for supporting thetool and the work for relative radial and rotary movement, inconjunction with means for causing relative movement of the tool and thework toward and away from each other, this latter movement beinggenerated by an operating member which swings back and forth through anarc and has an adjustable pivot whereby the radius of the arc ofmovement of such member can be adjusted. More specifically, I provide awork holding table which is rotated about a vertical axis,

- a carriage mounted above the table to travel transversely thereof,tool holding means mounted in the carriage for movement toward and awayfrom the table, and a member mounted above the carriage to rotate aboutan axis coincident with the axis of rotation of the table, this memberVbeing pivoted to swing about an axis extending diametrically of thetable and having operating connection with the tool holding means forimparting reciprocatory movement thereto. The pivotal mounting of thismember is adjustable to vary the radius of the arc through ywhich thelower end thereof moves, and thereis provided a sliding and universalconnection between the lower end of the member and the tool holderwhereby the combined rotary and swinging motion of the former isaccommodated. Further objects and advantages of my invention will appearfrom the detailed description.

In the drawings: L

Fig. l is a side view of a facing machine Vconstructed in accordancewith my invention;

Fig. 2 is a front view of the machine;

Fig. 3 is a horizontal sectional view taken substantially on line 3 3 ofFig. 2;

Fig. 4L is a vertical sectional view through the upper portion of themachine, taken substantially on line 4 4 of Fig. 3;

Fig. 5 is a fragmentary vertical sectional view through the upper partof the ram and carriage and associated parts, parts being shown inelevation;

Fig. 6 is a semi-diagrammatic view of the essential parts of the machineillustrating the operation thereof; y y

Fig. 7 is a view smilar to Fig. 6 but taken at right angles thereto, thework being shown in plan at the top of this view for ready reference;

Fig. 8 is a diagram illustrating approximately the path of travel of thecutting or equivalent means which need not be illuspoint of the toolduring one complete revolution of the work Fig. 9 is a diagram of theconnections between the operating motor and the automatically actuatedswitch controllingV the motor circuit.

The construction-of the main supportingv In practice this carriage isfed in either direction desired along the rail by a feed screw trated ordescribed in detail. This carriage is provided witha verticallyextending box-r like guide 6 the front of which is closed by removableplates 7. AAghollow ramV 8 of approximately rectangular cross section isslidably mounted inthe guide-member 6 for movement toward andV awayyfrom table 1.

AA tool holder 9 of known construction is secured in the lower portionof the ram 8 in any Vsuitable manner, as by means of set screws 10. Atool 11 of suitable type is suitably secured in holder 9 bymeans of aset screw 12. Upon reciprocat-ion of ram Sthe tool 11 will becorrespondingly reciprocated so as to be moved toward and away from thework secured upon table 1. p

lReferring more particularly to Fig. 5, I provide a clevis member 13 atthe upper end of ram 8, this member having a stem 14 which extends intothe upper end of the ram.

A stop collar 15 is secured on the lower end` of stem 14 in a suitablemanner.V In the specific embodiment illustrated, this collar isprovided,'adjacent its lower end, with a slot 16 and a cap screw 17 isinserted through the lower portion 18 of the collar and threaded intothe upper portion thereof so as to deform portion 18 and force it intobinding engagement with stem 14.` AnyV other suitable or equivalentmeans may be provided for securing the stop collar upon the stem. A wearplate or washer 19 is mounted about the stem of the clevis member and isconfinedbetween collar 15 and a suitable roller bearing structure 20disposed between stem 14 and the lower portion of a bearing sleeve orhousing 21 which is threaded into ram 8 at 22 and is locked againstturning movement in the ram by a screw pin 23 threaded through the wallof the ram and engaging into a suitable bore I or recess 24 of thebearinghousing. A sec.

ond roller bearing structure 25 is mounted in the upper end portion ofhousing 21 and is confined between head 26 of the clevis member andshoulder 27 of the housing. The bearings 20 and 25 and associated partsserve to hold the stem 14of the clevis member vagainst endwisevmovementin either direction relative to the ram 8 while permittingturning movement of the clevis member about the axis of stem 14 thereof.Any other suitable or preferred means may be employed for securing thestem of the clevis member against endwise movement relative to the ramwhilepermitting free turning movement of this stem and I do not,therefore, intend to limit'myself to the particular meansshown anddescribedfor-accomplishing this/result. .v

Head -26 lof the clevis member is provided, at each end thereof,.with anupwardly Vex-5 tending ear-28. -These earsA receive between them a lug29 depending from a connecting block 30, this lug being pivotallysecured to theears by a pin 31 which extends through a suitable bushing32. ThisV provides a uni-1:.`

versal'connection between the block 30 and the ram 8. v.

rllhe connecting block30 is of channel cross section and is provided. atthe yupper end of each'lateral wall with anvinwardly project-,g

ing flange 33. The fianges'33 engage over laterally projecting flanges34 of a lf-shaped head 35 provided at "the lower end of a swingingmember 36 the body portion of which isof elongated rectangular .shape.-

rrlhe head 35 is of greater length than the width ofvthe body of member36,-as illustrated y Member 36 is thus operatively connected to the ramby a combined sliding and universal connection which is adapted` to`permit rotationof this member about an yaxis coincident with the axis ofrotation yofthe table while also permitting swinging movementV ofmember-36 about an yexis eX- tending diametrically of the table. Member36'is supported for swinging movement by inner and outer blocksv 37 and38, respectively, arranged in pairs at opposite sides ofthis member. Astud shaft 39 (Fig. 3) projects fromblock 38 into block 37, the blocksof each pair Ybeing thus pivotally connected on a horizontal axis.Membgr 36 is provided at each side thereof with a longitudinallyextending supporting and guide element or rib 40 of dovetail crosssection, block 37 being provided with a flange 41 which fits about one.side of the rib as illustrated. At its other side the block is providedwith a flange 42 the inner fa-ceof which vis disposed perpendicular tothe body of the block. A clamping plate 43, having its inner facebeveled to fit the other inclinedy face of rib 40, is confinedbetweenthe rib and flange 42 .and is forced into clamping contact with .rib 4()by means of ico nuts 44 threaded onto screw-studs 45 secured in theblock 37, or in any other suitable manner. The block 38 includes aclamping section or member 46 which, with the block,fits snugly about avertically extending rib 47 of dovetail cross section, these ribs beingcarried by and preferably formed integral with, upwardly extending arms48 of an upper frame indicated in its entirety by 49. These arms are ofchannel or other suitable cross section. Each of the ribs 47 isprovided, in its inner face, with a central approximately .semi-circularrecess 50 which accommodates the outer portion of a substantiallycircular enlargement 51 at the central portion of block 38. Thisenlargement 51 is centrally bored and threaded for reception of a screwshaft 52, the lower end of which has bearing in a lug 53 projectinginwardly from the lower end of rib 47. The upper end portions of theshafts 52 extend through and have bearing in bosses 54 on the upper faceof a cap plate 55 seating upon and secured to the upper y ends of thesupporting arms or uprights 48.

Bevel gears 56 are secured on the upper ends of the screw shafts 52 andmesh with bevel gears 57 secured on the ends of a counter shaft 58rotatably supported by brackets 59 secured to cap plate 55. A spur gear60 is secured on counter shaft 58 and meshes with a spur pinion 61secured on the shaft of an electric motor 62 of suitable type which ismounted upon the cap plate. rThis provides a speed reducing drivebetween the motor and the screw shafts 52. lVhen the blocks are releasedfrom the rails 47 and from the ribs 40 they can be readily adjustedvertically in either direction Vby means of the screw shafts and themotor and associated parts, it being understood that a motor ofreversible type is employed for this purpose. p With the arrangementillustrated, the screw shafts 32 are rotated in opposite relation andare, therefore, oppositely threaded. Obviously the gearing for drivingthese screw shafts can be arranged, if desired to drive both shafts inthe same direction, in which case `the shafts will be similarlythreaded. Normally the blocks 37 are securely clamped to ribs 40 ofmember 36, and the blocks 38 are securely clamped to rails 47 of frame49. To effect clamping of blocks 38 to the ribs 47 cap screws 63 passthrough the clamping section 46 of this block and thread into the bodyor main portion thereof. When the pairs of blocks are thus secured inadjustment member 36 is supported for swinging movement about an axisextending diametrically of the work holding table 1.

The frame 49 includes an annular base or supporting member 64 which, inthe form illustrated, isv formed integrally with the uprights 48 and therails 47. The base member 64 is rotatably mounted upon an annular uppersupporting frame 65 the inner portion of which rests upon and is securedto the main supporting frame or structure 4, the outer portion of theupper supporting frame 65 being supported by a column 66 or in any othersuitable manner. Frame 65 is provided with an inwardly projectingshoulder 66 the inner face 67 of which is beveled downwardly andinwardly and has contact with the similarly beveled outer face of aretaining member 68 suitably secured to the under face of base member64. Preferably, a wear plate 69 is mounted on the upper face of shoulder.66 and a cooperating wear plate 70 is secured on the under face of theoutwardly projecting centra-l portion of the base member. The member 64is provided with an inner upwardly projecting fiange 71 about which fitsa gear ring 72 which is secured to member 64 in a suitable manner. Theconstruction of the frame 49 and associated parts and the mountingthereof on the upper fixed sup-V porting frame 65 can be varied in manyrespects, as will be evident to those skilled in the art, and l do not,therefore, intend to limit myself to the particular constructionillustrated and described, such construction being merely by way ofillustration. The ring 65 and the base member 64 of the frame 49 aredisposed in vconcentric relation to each other and to the table 1.Member 36 is thus supported 'for swinging movement about an axisextending diametrically of the table and forl rotation about an axiscoincident with the axis of rotation of the table.

Referring more particularly to Figs. 1 and 3, an electric motor 73 ofsuitable type is supported by a bracket structure 74 extending from themain supporting frame 4 at the top thereof. A pulley 75 is secured onthe shaft of this motor and has driving connection, -by means of a belt76, with a pulley 77 secured on a drive shaft 78 rotatably mounted inbrackets 79 suitably secured 'to the main frame 4. A bevel gear 80 issecured on shaft 78 and meshes with a bevel gear 81 secured on ahorizontal shaft 82 rotatably mounted in a bracket structure 83 suitablysecured to the main frame 4. A bevel gear 84 is secured on the inner endof shaft 82 and meshes with a bevel gear ring 85 suitably secured to theunder face of table 1. The uprights at the ends of the bracket structure83 are connected by a bridge member 86 having a central bearing sleeve87 through which is rotatably mounted the lower end portion of avertical shaft 88. This shaft has driving connection with shaft 82through the miter gears 89. The upper end portion of shaft 88 extendsthrough the top of the main supporting structure or frame 4 into andthrough a sleeve 90 of -the upper frame 65, suitable anti-frictionbearings 91 beingl provided in the upper portion of sleeve 90, fortheshaft. A spur pinion 92 is secured onthe upper end of shaft 88 andmeshes with the ring gear 72 for rotating the frame and the partscarried thereby. Frame 49 and the table 1 are rotated in the samedirection, as indicated by the arrows in Fig. 1, and the pinions 84 and92 are so proportioned, relative to the gear rings 85 and 72,respectively, that the table and the frame 49 are rotated at the samespeed. This provides simple and efficient means for rotating the tableand member 36 about a common vertical axis simultaneously and in thesame direction and at the same speed.

To assure accuracy of operation of the machine it is desirable thatmeans be provided for preventing any lateral movementV or play of member36, particularly when the supporting and clamping blocks are so`adjusted that the axisabout which this member swings is remote from thelower end or head 35 thereof.k Referring more particularly to Figs. 3and 4, member 36 is provided in its lower portion Vwith a centralopening 93 of elongated rectangular shape and with two smaller .openings94 at each :ide of the opening 93, the portion of member 36 between thecentral opening and each of the side openings being dressed or faced toprovide a guide -element 95. Flanged wear shoes 96 fit about elements 95at the inner sides thereof and are supported and adjusted on elements 95byadjusting screws 97 which pass through the guide elements and threadinto the shoes, the heads ofl these screws bearing against the. outerfaces of'elements 95. Pressure screws 93 are threaded through theelements 95 and bear against the outer faces of shoes 96.rk The screws97 and 98 provide means for supporting shoes 96 and for adjusting theminwardly and outwardly of the central opening 93. The wear shoes 96contact with theV lateral faces of a brace and guide beam 99 .whichextends through the opening 93, this beam being dis posed diametrically,of base member 64 of frame 49 and at right angles to member 36. Thebeam 99 may be supported and secured to member 64 in any suitable orpreferred manner. In the construction illustrated, I provide webelements 100 formed integrally with member64 at diametrically oppositeportions thereof. A pair of spaced supporting brackets 101 ofsubstantially L-shape are bolted or otherwise secured to the under faceof the web element 100and receive between them the end portion of beam99, this beam being secured to the brackets by bolts 102 or in anyothersuitable'manner. The. beam 99 is also provided, at the upper portion ofeach end thereof, with a web element-'103 4which is bored and threadedin their uppermost positionand, conse- Y quently, theradiusjof` the. arcthrough which the `lower end of.memberw36swings isathe greatest.. The...Wear shoes are adjusted to fit-snugly against the .sides of the beam99, but Vwithout binding, thus effectually preventingfanyv lateral play`or Vloose'ness of member 36 andguiding, it accurately/dur ing itsswinging movement to and fro. This assures .accuracy in operation Aofthemachine as well as relieving thesupporti'ng blocks and 4associated partsofundesirable stresses which would result fromnot properlyV bracing thelow-er portion lof member 36 against lateralplay.v j' Y l I haveillustrated my ,machine as used for dressingfor facing. the base flange106of a steam nozzle107 for a steam boiler. To as,- sure a proper fitbetween this flange. and the boiler shell .it is Anecessary that the:flange be dressedor facedfonfa radius corresponding to the exteriorradius .offthei boiler. The

supporting blocks fory vmember 36 are ad'- justed at the proper radiusby first releasing the clamping-members of these blocks in the mannerpreviouslyA described and then rais# ing or loweringrthem theproperdistance by means of the screw shafts 52 and motor '62. Before releasingthe clampingblocks, a stop member or block .is placed between the lowerend of ram 8 and the .table or theworkon the table so` asito preventydownward Amovement of .member 36 whenreleased. The adjustment of thesupporting blocks should be such that the distance between the axisabout which member 36 swings and the axis of lthe pin 31 is vequal tothevdesired. radius.V This may be determined by ,direct measurement orone of the supporting blocks for vmember 36 may be provided with anindicating point 107 moveable over a scale Von the swinging member whichis properlycalibrated for this purpose.V After the supporting blockshave been` properly adjusted they are 'securely clamped to member 36andto 'the supporting and guide railsV 47, after which .the blockbeneath the ram 8 is removed and the work is secured on table l byclamps 108 in a known manner. `The workor nozzle: 107 .should bedisposed concentricallyl with table 1 so-that itsvertical axis coincideswithV the vertical i periphery thereof. Rotation of the table 1 turnsthe work in cutting engagementfwith the 4tool and, during rotation ofthe frame 49, member 36, due to its connection to the ram, swings in anarc transversely of the table toward and away from central position thusraising and lowering the cutting tool, the cutting point of the tooldescribing approximately a sinusoidal curve during each completerevolution of the work, this curve corresponding to the development ofthe desired surface formed on the face ofthe flange 106. As rotation ofthe table 1 and the frame 49 continues, the carriage is moved along itsrail 3 so as to move the tool 11 radially of the work, this operationcontinuing until ther entire width of the flange has been dressed orfaced.

The operation of my machine will be understood more clearly by referenceto Figs. 6, 7 and 8. In Fig. 6 member 36 is shown as pivoted to swingupon an axis adjacent the head 35 so that the pin 31 moves through anarc of relatively short radius. Member 36 is shown as in its central orvertical position with the cutting tool 1l in its lowerinost position,at which time the cutting point of the tool is at the bottomv of thecurve or to the zero position on the plan view of the nozzle in Fig. 7.As rotation of the frame 49 continues in a counterclockwise direction,the lower end of member 36 swings toward the right as considered in Fig.7, this movement continuing until the work has turned through onequarter of a revolution, that is through an angle of 90 degrees, atwhich time the pin 31 is in its uppermost position and, consequently,the tool 11 is in its uppermost position corresponding to the high pointof the desired face on the flange 106. With member 36 pivoted to swingabout the axis a the block 30 swings through portion c-cZ of the arccZ-e having a radius def. During this swinging movement of member 36,head 35 slides through the connecting block and the clevis member 13turns in ram 8 in the manner previouslyv described. As

rotation of the work continues the pin 31 is moved downwardly untilmember 36 is again in vertical position, at whichv time the pin 31 is inits lowermost position and the cutting tool is disposed at the low pointof the trough of flange 106. As rotation of the work continues member 36again swings toward the right raising the pin 31 until this pin is atits high point when the work has been turned through another 90 degrees,and the pin is again lowered during the succeeding 90 degrees ofrotation of the work so as to be returned to its low point position. It

will thus be seen that in a single revolution of the work, and,consequently, a single cut of the tool, indicated at X, starting atzero,

- the tool is in its highest position at 90 and 270 degrees andis in itslowest position at zero and 180 degrees. The cutting point of the tool,in effect, is thus caused to travel through an approximately sinusoidalcurve such as that illustrated in Fig. 8 in which the high and lowpoints of the Atool corresponding to Fig. 7 are indicated. In additionto this reciprocating movement imparted to the tool by member 36, thismember acts to raise the tool ata uniform rate corresponding to thecurvature of the surface produced by facing the flange, since thecarriage is fed toward the right so as to move the tool radially of theflange. This does not, however, affect the proper operation of thecutting tool toward and away from the work since the radius of the arccZl-ef is fixed and member 36 is returned to verticalv position aftereach half revolution thereof with the frame 49. With member 36 adjustedto swing about the axis al the tool will be reciprocated through thevertical distance it in the manner previously described. This distancecorresponds to thevertical distance between the high and low points ofthe flange 106 being faced on the radius arf-j".l If itis desired toface a flangewon a greater radius as, vfor example, the radius j, theclamping and supporting blocksare adjusted so that the axis thereof isdisposed at the point z' kof Fig. 7. WithV the blocks thus adjusted theconnecting block 30 is, in effect, moved through an arc having theradius -j shifting the tool vertically through the distance 7: whichcorresponds to the vertical distance between the high and low points ofa nozzle flange being faced on such radius. j

Vhile I have, for the sake of clearness in description, referred to theconnecting block 30 as being moved through an arc with member 36, thisis not strictly correct. In fact, the lower end of member 36 swingsthrough an arc and the connecting block swings about the pin 31, but theradiusvwhich is effective in raising and lowering the ram 8 is thedistance'between the axis of pin 31 and theaxis about which the member36 swings. With this explanation, it is thought that the description ofthe operation of the machine will be clear to those skilled in the art.For purposes of comparison, I have shownin the ico lower portion of Fig.7, the vertical distance lo in relationto a fiange indicated at 109,this flange being faced on the rad-ius y'. VIt will be noted that thelow point of the cutting tool is the same in each instance, a high pointbeing different according to the ,radius of the face produced on theflange. While I have illustrated and described my machine as used forfacing nozzle flanges, it is well adapted for 'facing various otherarticles upon which it is desired to produce a substantiallyfrusto-cylindrical surface ofanydesired radius.` j Y vDue to thefaotthat member 36 is disposed 'in the carriage.

at an angle to the'V ram during movement of thetool from its high pointto its lowpoint on the work, and vice versa there is a side pull' onthis ram. Ordinarily thisside pull is not objectionable and does nothaveany serious tendency to cause binding of the ram I have found, however,that if the angle between member 36 and the ram becomessufficiently-small the side pull on the ram and consequent bindingthereof becomes a serious consideration and might, in eXtreme cases,ycause breakageofthe Amachine. To avoid this I provide means whereby thecircuit of the main operating motor I73 is opened automaticallybeforethe swinging member reaches the binding; position stated. This meansincludes a plunger-:rod 110 which?l is slidably mounted throughfstem 14of the clevis member 13.V This rod fisprovided at its upper end with anenlarged head 111 operating in an enlarged b'ore for recess112-extending from the upper end :of stem 14C.' Anexpansion-coilfspringllis mounted inf this boreV about rod 110 and visconfined between the bottom ofthe bore and head '111. Thisspring urgesthe head fof rod 110 toward lug 29 vof the connecting rod :30. Upwardmovementl of 'rod 110 is `limited by a stopmember 114-suit`ably securedthereon and `abutting the/lower end of fstem 14. A flanged collar 115 issecured on'the rod 110 belowV member 114 and serves to guide the vrodinits operation in the ram 8. A pair of, trip plates 116," having beveledinner edges, are secured to lug29 at lthe opposite sides thereof, theseplates being disposed to depress the rod '110, by contact with the head111 thereof, when-the block 3() is swung into ,its eXtreme position ineither direction and before member 36 lis at its critical/angle to theram. l

A trip arm 117 Vis vpivoted at one end, at

` 118, in an-opening 119 provided through one wall ofthe ram 8. Theopposite end of this arm operates through an opening 120 through theopposite wall of thevram and is provided'with aneye 121 through which isthreaded a screw 122 which is secured in adjustmentthrough the eye by alock nut 123. For convenience in adjusting the screwvit is provided witha-knurled head 124 at its lower end; Head 124Cis disposed adjacentthe-upper end of a button-125 Aof an electric LswitchY-l26fof fknowntype disposed within a casing 127 which'is secured to the -ram formovement therewith. When the rod V'110 is ,depressed -it contacts with alug -128 projecting laterallyffrom arm 117 and depresses `the arm thusactuating switc'h 126-to openthe motor circuit." This-serves tostopoperationA of-t-he machine-and thus avoids possibility Of-damagethereto due to member 361 being- @dispos'edl 'at- 'too great aninclinationto the ram 8. The operation of this control 'switchw'ill fbereadily understood fromFig. 9 in which-I have-illustrateddiagrammatically the manner of connecting the switch into the motorcircuit. The switch itself is of a well known type and need not beillustrated nor described in detail. Ordinarily this switch will notcome into play during the operation of the ma chine and is of use onlywhen facing flanges and similar articles of unusually short radius or ofunusual width. Under ordinary conditions, there is no serious bindingbetween the ram and the guide therefor car'-V ried by the carriage andthe' safety control switch is not necessary, the provision of thisswitch being a precautionary measure to take care of unusual conditions.

InY the specific embodiment of myinvention shown by way of example, thework holding table and the frame carrying the swinging membererotate ona common axis. My invention is not, however, limited Ito thisspeciicconstruction and comprehends,

Ain itsbroader aspects, any suitable means for causing-'relative rotarymovementfbetween the work and the tool. The desired results can beaccomplished, in example, by having the -work supporting table andtheframe carrying the swinging member sta= tionary and movingthe toolholding device, and consequently the too1,in a circular path vconcentricwith the nozzle the flange `of whichf is beingfaced." Within the-'scopeof my invention I contemplatethebroad com,- bination of work holdingmeans'and tool holding means having relative movement toward'and awayfrom each other, in combination -withmeans for causing relative rotarymovement between the work andthe tool andmeans for actuating the tool inproper manner to cause the cutting point thereofico Y to describe,inleifect,a sinusoidal curvevcor-V Y responding to the development ofthe frustocylindrical sur-face being faced;` Thebroader of theappendedclaims `are,vtherefor, to

Aof a pipe for juncture Iwitha second pipe.

By a frusto-cylindrical surface, I' mean; a surface of a'troughshape',such as a steam nozzle flange, which is curvedon 4a radius to i'itfthecylindrical surface-of a''boiler shell." Y i 1. In a `machine for-facingfrusto-cylin-,J

drical surfaces, work holding means and tool holding means havingrelative rotary and radial movement, an oscillating member movable in anarc toward and away from the work holding means, the arc of movement ofsaid member extending transversely of said work holding means,connections between the oscillating member and the tool holding means,said connections moving the tool holding means toward and away from thework holding means through a path corresponding toy the arc of movementof the reciprocating member, and means for varying the radius of the arcof movement of said member.

2. In a machine for facing frusto-cylindrical surfaces, work holdingmeans and tool holding means having relative rotary and radial movement,means for causing relative movement of the work holding means and thetool holding means one toward and away from the other, the means forcausing such movement including an oscillating member movable through anarc extending transversely of the work holding means, and means forvarying the radins of the arc of movement of said member.

3. In a machine for facing frusto-cylindrical surfaces,'a support, acarrier on the support,'a tool holding device having translatorymovement in the carrier, a second support, a member mounted on saidsecond support for swinging movement, and slidably connected to saidtool holding device, said member andthe carrier having relative rotarymovement, said carrier being movable toward and away from the axis ofsaid rotary movement, and work holding means, the tool holding deviceand the work holding means having relative rotary movement.

4. In a machine for facing frusto-cylin-V drical surfaces, a support, acarrier on the support, a tool holding device having translatorymovement in the carrier, a second support, a member mounted on saidsecond support for swinging movement, and slidably connected to saidtool holding device, the first mentioned support and said second supporthaving relative rotary movement, and said' carrier being movable towardand away from the axis of said rotary movement, and work holding means,the tool holding device'and the workholding means having relative rotarymovement. Y

5. In a machine for facing frusto-cylindrical surfaces, -a support, acarrier on the support, a tool holding device having reciprocatingmovement in the carrier, a second support, a member mounted on saidsecond support for swinging movement, and slidably connected to saidtool' holding device, said member and the carrier having relative rotarymovement and the carrier having movement toward and'away from the axisof said rotary movement, and work holding means, the tool holding deviceandthe work holding means having relative rotary movement.

6. In a machine for facing frustocylin.

drical surfaces, a tool holding device mounted for reciprocatingmovement, a member mounted to swing about an axis and connected to saidtool holding device, said member and the tool holding device havingrelative rotary movement on an `axis substantially normal to the axis ofswinging movement of said member, means for moving the tool holdingdevice toward or away from the axis of said rotary movement, and workholding means, the tool holding device and the work holding means havingrelative rotary movement.

7. In a machine for facing frusto-cylindrical surfaces, mounted forreciprocating movement, a member mounted to swing about an* axis andconnected to said tool holding device, said member having rotarymovement on an axis normal to the axis of its swinging movement, meansfor shifting the tool holding device toward or away from the axis ofsaid rotary movement, and work holding means, the tool holding deviceand the work holding means having relative rotary movement.

8. In a machine for facing frusto-cylindrical surfaces, a tool holdingdevice having movement in two planes substantially normal to each other,a member mounted for swinging movement about an axis and connected tosaid device, the tool holding device and said member having relativerotary movement on an axis substantially normal to the axis on which themember swings, and work holding means, the tool holding device and thework holding means having relative rotary movement.

9. In a machine for facing frusto-cylindrical surfaces, a carrier, atool holding device having translatory movement in theY carrier, saidcarrier having translatory movement at right angles to said firstmentioned translatory movement, a swinging!- member connected with saidtoolrholding device, the carrier and the swinging member having relativerotary motion on an axis substantially normal to the axis of swingingmovement of said -member, and work holding means, the tool holdingdevice and the worlr' holding means having relative rotary movement.

l0. In a machine for facing frusto-cylindrical surfaces, work holdingmeans, tool holding means, a member mounted for swinging movement, thework holding means and the swinging member having relative rotary motionon an axis substantially normal to the axis on which said member swings,the tool holding means being connected with the swinging member forreciprocation thereby toward and away from the work holding means, andmeansv for feeding the tool holding means substantially at right anglesto its reciprocation, the tool holding means and the swinging memberhaving relative rotary movement.

11. Ina machine for facing frusto-cylindrical surfaces, a tool holdingdevice, a member mounted for Vswinging movement and having sliding androtary connection la with said device, said member and the tool holdingdevice having relative rotary motionand the cutting point of the toolgenerating a cur-ve corresponding to the intersection of twocylinders,and work holding means, the tool holding device and the work holdingmeans having relative rotary movement.

12. "In a machine for facing frusto-cylindrical surfaces, a rotatabletable for supg. porting the work, a Vcarriage `moveable transversely ofthe table, tool holdingmeans mounted in the carriage for movement towardand ,away fromV the table, a 4member pivotally mounted beyond thecarriage for 2:2 swinging movement about an axis extending diametricallyof the table, means `for rotating said member about an axis coincidentwith the axis of rotationof the table and at-the same-speed as thetable, and zur.J connections between the swinging member and the toolholding means, said connectionsimparting movement to said tool holdingmeans toward and away from the table insynchronism with the rotationthereof, saidv connections comprising Va member connected tothepivotally mounted member for relative sliding movement in a directionparallel to the pivotalaxis of said pivotally mounted member.

13. VIn a machine for facing frusto-cylindrical surfaces, a rotatabletable for sup-fV porting the work, a carriage moveable transversely ofthe table, tool holding means mounted in the carriage for movementtoward and away from the table, a member pivotally mounted beyond thecarriage for swinging movement about an axis extend-Y ing diametricallyof the table, means for rotating said member about an axis Vcoincidentwith the axis of rotation of the table and at the same speed as thetable, and a combined sliding and pivotal connection between the pivotedmember and the tool holding means imparting reciprocatory mo- 551i tionto the tool holding means in accordance with the swinging of saidmember.

14:. In a machine for facing frusto-cylindrical surfaces, a rotatabletable for supporting Vthe work," a carriage moveable transversely of thetable, tool holding means mounted in the carriage for movement towardVand vaway from the table, a member pivotally Vmounted beyond thecarriage for Iswinging movementabout an axis extending diametrically ofthe table, the ax-,is Aof of the table, and connections between saidmember and the tool holding `means reciprocating the latter' inaccordance with the swinging motion of lthe swinging member, saidAconnections comprising a-member connected to the pivotally mountedmember for relative sliding movement in a direction parallel to thepivotal axis of movement of said pivotally mounted member.

15. In a machine for facing frusto-cylindrical surfaces, a worksupporting table rotatable about a vertical axis, a carriage above thetable and moveable transversely thereof, tool holding means mounted, inthe carriage for reciprocating movement toward and away from the table,a frame mounted above the carriage and rotatable about an axiscoincident with the axis of rotation of the table, a member mounted inthe frame for swinging movement about an axis extending diametrically ofthe table, means for rotating the table" and the frame simultaneouslyand at the same speed, and operating connections between said member andthe tool holding means, said connections moving the tool holding meanstoward and away from the table in accordance with the swinging movementof the swinging member.

16. In a machiner for facing frusto-cylin- Y drical surfaces, Va lwork'supporting table rotatable about a vertical axis, a carriage above thetable and moveable transversely thereof, tool holding means mounted inthe carriage for reciprocating movementV toward and away from the table,a frame mounted above the carriage and rotatable about an axislcoincident with,V the axis of rotation of the table, a member mounted inthe frame for swinging movement about an axis extending diametrically ofthe-table,

means for rotating the table and the frame n simultaneously and at thesameA speed, operating connectionsbetween the member and the toolholding means, said connections c moving the tool holding means towardand away from the table in accordance with the swinging movement of saidmember, and means for adjusting the axis about which the memberswingstoward and away from Y the table. Y i

17. In a machine for facing frusto-cylindrical surfaces, a worksupporting tablerotatable about a verticalaxis, a carriage above thetable and moveable transversely thereof, tool holdingmeans mounted inthe carriage for`V movement toward and away from thetable, a framemounted above the carriage and rotatable about an axis coincident withthe axisV of arotation ofl the table, a

member mounted in they frame for swingingv movement about an axisextending diametrically of the table, means for rotating the table andthe frame simultaneously and at the same speed, the member having aheadat its lower end extending transversely of the table, a block connectedto said head for vertical movement therewith, said head being slidablethrough the block, and a universal connection between the block and thetool holding means.

18. In a machine for facing frusto-cylindrical surfaces, a worksupporting table rotatable about avertical axis, a carriage above thetable and moveable transversely thereof, tool holding means mounted intheV carriage for movement toward and away from the table, a framemounted above the carriage and rotatable about an axis coincident withthe axis of rotation of the table, a member mounted in the frame forswinging movement about an axis extending diametrically of the table,means for rotating the table and the frame simultaneously and at thesame speed, the member having a head at its lower end extendingtransversely of the table, a block connected to said head for verticalmovement therewith, said head being slidable through the block, auniversal connection between the block and the tool holding means, andmeans for adjusting the axis about which said member swings toward andaway from the table.

19. In a machine for facing frusto-cylindrical surfaces, a worksupporting table rotatable about a vertical axis, a carriage above thetable and moveable transversely thereof, tool holding means mounted inthe carriage for movement toward and away from the table, a framemounted above the carriage and rotatable about an axis coincident withthe axis of rotation of the table, said frame having vertical guide andsupporting rails, a member disposed between said rails and having ateach side a vertical guide and supporting element, pairs of blocksbetween the guide rails and the side elements of the member, the blocksof each pair being pivotally connected on an axis extending transverselyof said member, means for releasably and adjustably securing the blocksto the member and said rails, respectively, means for rotating the tableand the frame simultaneously and at the same speed, and a combinedsliding and universal connection between the tool holding means and saidmember, said connection reciprocating the tool holding means inaccordance with the swinging of the swinging member.

20. In a machine for facing frusto-cylindrical surfaces, a worksupporting table rotatable about a vertical axis, a carriage above thetable and moveable transversely thereof, tool holding means mounted inthe carriage for movement toward and away from the table, a framemounted above the carriage andfrotatable about an axis concident withthe axis of rotation of the table, a member, pairs of blocks connectingthe memberat the sides thereof to the frame, the blocks of therespective pairs being pivotally, connected on an axis extendingtransversely of said member, means for releasably securing the locks tothe frame and the member, means for adjusting the pairs of blockssimultaneously and lengthwise of said member, means for rotating thetable and the frame simultaneously and at the same speed, and aIcombined sliding and universal connection between the member and thetool holding means for reciprocating the latter in accordance withmovement of said member.

2l. In a machine for facing frusto-cylindrical surfaces, a worksupporting table rotatable about a vertical axis, a carriage on thetable and moveable transversely thereof, a ram mounted in the carriagefor movement toward and away from the table, -a frame mounted above thecarriage and rotatable about an axis coincident with the axis ofrotation of the table, a member mounted in the frame for swingingmovement about kan axis extending diametrieally of the table, a clevismember mounted in the ram for turning movement about a vertical axis andconnected to the ram to impart vertical movement thereto, a connectingblock pivotedto said clevis on a horizontal axis, means connecting theblock to the lower end of the swinging member for vertical movementtherewith, said connecting means being constructed to permit horizontalsliding movement of said swinging member relative to the block, toolholding means carried by the ram, and means for rotating the table andthe frame simultaneously and at .the same speed.

22. In a machinev for facing frusto-cylindrical surfaces, .a rotatabletable for supporting the work, a carriage movable transversely of thetable, tool holding means mounted in the carriage for movement towardand away from the table, a member mounted beyond the carriage forswinging movement about an axis extending diametrically of the table androtatable on van axis coincident with the axis of rotation of the table,means for simultaneously rotating said member and the table in the samedirection and at the same speed, andV connections between said swingingmember and the tool i holding means, said connections imparting movementto the tool holding means toward and awayv from the table in synchronismwith the rotation thereof. Y i Y 23. In combination in a maehinef'o'ftheV character. described, a frame, a member mounted in the frame'forswinging movement about an axis extending transversely thereof, andmeans carried by said frame for guiding the member during swinging move-IZB ment thereof, said means holding said member against lateralmovement.

24. In combination 1n a machine of the characterA described, a frame,- amember mounted in the frame for swinging movement about an axisextending transversely thereof, said member 'having 'an opening, and aguide beam carried by the frame and extending through said opening atright angles to the axis of movement of the member, said beam and saidmember having cooperating means for guiding the member and holding itagainst lateral movement during swinging thereof.

25. In combination in a machine of the character described, a frame, amember mounted in the frame for swinging movement about an axisextending transversely thereof, said member having an opening, a braceand guide beam secured to the frame and extending through said openingat right angles to the axis of movement of the member, wear shoesmounted on said member at the sides of the beam, and means for adjustingsaid shoes towardV and away from the lateral faces of the beam.

26.'In combination, a holding device a member mounted for swingingmovement and having sliding and rotary connection with said device,means for rotating said member, the holding device generating a curvecorresponding to the intersectionof two cylinders, and work holdingmeans,

the holding device and the work holdingv means having relatively rotarymovement.

27. In a machine for facing frusto-cylindrical surfaces, a tool holdingdevice, a member mounted for swinging movement on an axis and havingsliding and rotary connection With said device, said member and the toolholding device having relative rotary motion and the cutting point ofthe tool generating a curve corresponding to the intersection of twocylinders, the distance be'- H tween said axis andthe connection betweensaid member and the tool holding device being approximately equal to theradius generated, and work holding means, the tool Y Vholding device andthe work holding means having relativerotary movement.

28. In a machine for facing frusto-cylindrical surfaces,fa carrier, aVtool holding device having translatory movement in the carrier, saidcarrier having translatory movement at right angles to the'movement ofthe tool holding device, a member mountedfor swinging and rotarymovement and slidably connected to the tool holding device,

and rotatable work holding means.

In witness whereof, I hereunto subscribe my name this 23d day'ofJanuary, 1928.

JAMES HALL TAYLOR.V

CERTIFICATE OF CORRECTION.

Patent No. 1,768,272. Granted June 24, 1930, to

JAMES HALL TAYLOR.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 7,line 13, claim l, for the word "reciprocating" read oscillating; andthat the said vLetters Patent should be read With this correctiontherein that the same may conform to the record of the case in thePatent Office.

Signed and sealed this 9th day 0f September, A. D. 1930.

M. J. Moore,

(Seal) Acting Commissioner oi Patents.

